Compound for preserving timber



FlPiFrUl UNITED STATES PATENT OFFICE.

COMPOUND FOR PRESERVlNG TIMBER.

SPECIFICATION forming part of Letters Patent No. 404,302, dated May 28, 1889.

Kpplication filed February 21,1889. Serial No. 300,747. (No specimens.)

To all whom it may concern:

Be it known that I, JOSEPH \VATSON PUT- NAM, a citizen of the United States, residingat New Orleans, in the parish of Orleans and State of Louisiana, have invented certain new and useful Improvements in Compounds for Preserving Timber; and I do hereby declare that the following is a full, clear, and exact description of the same.

The object of my invention is to provide an improved compound for the purpose of preserving timber from decay and for protecting it from the destructive attacks of land or marine animals.

. My invention consists in a wood-preservation compound containing rosin thoroughly mixed with petroleum and creosote-oil, or oil from the distillation of coal-tar, or oil extraeted from resinous timber by destructive distillation, (known as pine-wood oil, and may contain all the ingredients.

lleretofore, in the use of petroleum, creosote and coal-tar oils, and similar oils for the preservation and protection of wood, it has been found that when wood treated with oil alone is exposed to the action of water the oil is gradually washed out and its preservative properties dissipated. By the addition of rosin to the oils named I have found that they are rendered tenacious and their staying qualities greatly increased, so that wood saturated with rosin and oil is made more durable and better able to withstand the attacks of insects and marine animals and the deteriorating influences of air and moisture.

For the purpose of my invention I prefer to employ rosin, petroleum, and creosote-oil; but I may use any oil from the distillation of coal-tar, and I may also use pine-tree oil obtained from the destructive distillation of resinous timber.

The rosin and oils are mingled by natural solution or by heat, natural or artificial, according to climate, ordinary summer temperature being sufficient to enable the oil or oils to dissolve the rosin. When artificial heat is employed, the temperature may be increased to 200 Fahrenheit, though the rosin and oil will readily combine at a lower. temperature.

The rosin and oils are mixed in varying proportions'in a suitable vat, and the resulting compound, in a liquid or semi-liquid state, may be applied by means of a brush to the timber to be preserved, or by immersing the timber in the liquid or semi-liquid compound, or by forcing the compound into the pores of thewood by any suitable means.

No particular proportions of the rosin and either or all of the oils need .be observed in preparing the compound, except that the quantity of oil or oils should be sufficiently in excess of the rosin to facilitate a thorough solution of the resinous ingredient.

I have found that a compound of rosin, petroleum, and creosote-oil, or" oil from the distillation of coal-tar, as above described, makes an effective protection for timber from the ravages of insects, and that by applying it in such a manner as to e'xelud ir and moistuge t lre tinflmlji preserved from decay for long periods.

Having thus'described my invention, what I claim is- A wood-preserving compound containing rosin, petroleum, and creosoteag'l, substantiallyas'deTrim w In testimony whereof I have hereunto subscribed my name in the presence of two witnesses.

I J OSEPII WATSON PUTNAM.

Vitnesses:

GEo. MONTGOMERY, D. I. DOWERS. 

